Jaymez Perry's last known in-person sighting was at the home of a relative in Los Angeles, California on Dec. 29, 2017.

Jonghyun Won was last thought to be in Grand Canyon Sept. 17, 2017. His vehicle was sighted near New Hance Trailhead and found abandoned at Moran Point.

Butler was last seen in Tusayan, Arizona on August 1, 2017. He is from Ohio and had driven to Arizona to visit the Grand Canyon.

David was hiking NOBO from Mexico to Canada. On April 6, 2017 he sent an email to his family from an Idyllwild library. O’Sullivan, who is from Ireland, intended to hike north into the San Jacinto Mountains the next day. He has not been seen since. There are several trails he could have taken to access the PCT from Idyllwild. We do not know which trail David took.